Finding the Fourth Proportional to 150,457.50, 207,631.35 and 83,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   150,457.50 : 207,631.35 = 83,389.50 : x
2. Step 2: Convert to fraction form
   150,457.50/207,631.35 = 83,389.50/x
3. Step 3: Cross multiply
   150,457.50x = 207,631.35 × 83,389.50
4. Step 4: Simplify right side
   150,457.50x = 17,314,274,460.83
5. Step 5: Solve for x
   x = 17,314,274,460.83/150,457.50
6. Step 6: Final answer
   x = 115,077.51